Evaporator and shelf



OC- 10, 1933- F. G. SLAGEL EVAPORATR AND SHELF Filed Dec. 5l, 1951 Patented oct. 1o, 1933 y a 1,929,938

EVAPORATOR AND- SHELF Franklin G. Slagel, Buffalo, N. Y., assignor to Fedders Manufacturing Company, Inc., Buffalo, N. Y., a. corporation of New York Application December 31, 1931 Serial N0. 584,213 v -2 Claims. V(Cl. 62-126) This invention relates to mechanical refrigereach sideof the conduit means in order to seal ating systems and more particularly to evaporathe same as aconduit. A refrigerant inlet nipple tors with refrigerated shelf means. 17 extends from the outer Wall at one end of the It is the general practise to provide refrigeraevaporator, while a refrigerant outlet nipple 18 tion evaporators witha freezing chamber in which extends from the outer wall at the other end of is arranged shelf means for increasing the food the evaporator. supporting surface. In order to accelerate the The duct means around the evaporator is in'- rate of heat transfer from food supported in the terrupted adjacent the outlet end, and connected evaporators, it has been heretofore proposed'to therewith to complete the refrigerant circulatory lo circulate the refrigerant adjacent the shelf means. system is means connected with the shelf. 6d

An object of the invention is to provide'a new The Shelf ShOWn in Figs. 1 t0 4 0f vthe drawing and novel form of'refrigerated shelf for evapo iS preferably formed Of tWOv Sheets of metal 20 rator chambers. and 21 which are welded together along their Another object of the invention is to provide a` edges, aS indicated at 22, and the front end 23 l5 refrigerated shelf which is connected with an 0f the tOD Sheet iS bent alOund the fIOnt end 0f 70 evaporator so that the duct means of the shelf the under sheet and'welded thereto. The under forms a part of the circulating system through Sheet? 0f the Shelf iS formed With a deDTeSSed which refrigerant must travel in passing from serpentine rib 24 extending mainly lengthwise the evaporator. thereof. The sheets are welded along the sides A further object of the invention is to provide 0f the depleSSed rib, aS indicated at 26. t0 Seal 75 a refrigerated shelf for evaporators which can the C0ndnit 01 duet IneanS fOlnled by the lb and be economically fabricated and associated with the adjacent Dertien 0f the overlying Sheet- The an evaporator. rear end 27 of the shelf is bent upwardly and the Other objects of the invention will appear from under Sheet iS formed With a pair 0f 10I1Eitl1- the following description taken in connection dinally eXtending DreSSed Out IbS 28 and 19 80 with the drawing, which forms a part of the Which communicate with the end of rib 24 and specification, and in which: form connecting means with the interrupted por- Fig.1 is a side elevation of an evaporator with tOn 0f the Conduit 0I duet means alund the a refrigerated shelf therein incorporating the eVaDOTetOI- ThiS uptllrned end alSO SeYVeS t0 3G invention. form a partial rear wall for the evaporator charn- 85 Fig. 2 is a plan view of the same, ber. The turned under front end of the top Fig. 3 is a front elevational view ofthe same. Sheet 0f the Shelf eXtendS beyOnd the Shelf DIOD- Fig. 4 is a plan view, partially broken away, er and forms legs 29 which are welded, or othershowing the refrigerated shelf removed. from the wise secured, to the inner wall of the evaporator. evaporator. The interrupted ends 30 and 31 of the evapora-V 90 Fig. 5 is a perspective view of the evaporator tor duct means terminate in nipples into which and another form of refrigerated shelf, looking fOrWardly extending niDDleS 32 and 33 0f the Shelf at the rear end. back telescope and are soldered or welded to form Fig. 6 is a sectional view of the modined form a leak proof Seal. the nipples 32 I:md 33 4being of shelf taken on line 6 6 of Fig. 5. formed at the ends of the ribs 28 and 19 from the Referring now to the drawing by characters of outer sheet of the shelf back. As shown in Fig. reference, 10 represents generally an evaporator 4, the rear end 0f the Sheets fOIming the Shelf formed of two sheets of metal 11 and 12 bent to are welded together on both Sides 0f the nipples form an enclosed open end chamber for the storand the inner Sheet iS Cut Out t0 TeCeVe the nipage of food or liquid. The inner sheet of metal ples 0f the enter Sheet A p01t0n 0f the end 0f O is flat, while the outer sheet of metal is formed the evaporator sheet is cut out, as indicated at 34, with apressed out rib 13 forming with the adja.. to receive the portion of the shelf sheet on which cent inner sheet a continuous duct means 14. the nippleS 32 and 33 are formed- The duct means extends from the rear to the front The evaporator iS adapted t0 fOIIn a Dart 0f .50 of the evaporator in parallel loops which surround a COIlVeIltlOnel COInpl'eSSOIeVap01`at0I`C0nden 150 the chamber. The two sheets of metal are weldser refrigerating system, and the nipple 18 is coned together at the front and rear ends of the nected with the compressor and the nipple 17 is abutting edges, as indicated at 15, and along the connected with the condenser. Refrigerant flows junction of the'abuttng edges, as indicated at into thenipple 17 and around the evaporator 16. The sheets are also welded together along duct means, then through the duct 28 intofthe 110 duct means in the shelf proper. Refrigerant flows through the duct means 19 and into the evaporator outlet duct means and nipple 18. It will thus be seen that the shelf forms an intervmediate portion of the refrigerant circulatory system of the evaporator, and that all refrigerant passing into the evaporator must flow through the shelf before leaving the evaporator.

In Figs. 5 and 6, I have shown another form of refrigerated shelf. In this instance, the shelf is formed of two sheets of metal 40 and 41, the upper sheet being flat and having extended arms 42 which are welded or otherwise secured to the inner wall of the evaporator. The under sheet is formed with a depressed serpentine rib 43 which extends mainly longitudinally of the shelf and the ends thereof are at the rear and terminate in nipples 44 and 45. The sheets are Welded together around their edges, as indicated at 46, and also along the sides of the depressed rib or duct means. A pair of hollow legs 47 and 48 telescope into the nipples 44 and 45 respectively providing refrigerant inlet and outlet means for the duct means in the shelf as well as a support for the shelf.

The evaporator with which this form of shelf is associated is similar to that previously described and the inlet nipple for the evaporator duct means is at the front and the outlet nipple is at the rear. The duct means is interrupted at the rear duct loop and the interrupted portion terminates in spaced nipples 49 and 50 extending upwardly from the inner wall of the evaporator so that the hollow. supporting legs can be tele- ,scoped therein. The refrigerant in this instance flows into the inlet nipple 17, through the duct means to the leg 47, through the duct means in the shelf and then through the leg 48 to the outlet end of the rear leg 49 of the evaporator duct means and out through the nipple 18.

It will be seen that the shelf means can be economically fabricated, and that the refrigerant in passing through the evaporator must flow throughthe shelf means, thus accelerating Vheat transfer from the material supported on the shelf or contained in the refrigerated chamber.

Although the invention has been described inI connection with certain specific embodiments, the principles involved are susceptible of numerous other applications which will readily occur to persons skilled in the art, and the invention is therefore to be limited only as indicated by the scope of the appended claims.

What I claim is:

1. In an evaporator for a refrigerant system, a housing having duct means forming a freezing chamber, a shelf comprising a pair of superimposed connected sheets of metal formed with a serpentine duct therebetween, said shelf having a rectangular portion mounted in said chamber to form an ice tray mounting and an angular terminal portion forming a partial rear wall for the chamber, and means connecting the housing duct means to the shelf duct for fluid communication.

2. In an evaporator for a refrigerant system, a

,housing having duct means forming a freezing chamber, a shelf having a serpentine duct therein, said shelf having a portion extending horizontally in said chamber to form an ice tray mounting and a bent terminal portion extending angularly thereto and forming a partial ear wall for the chamber, and means connecting the housing duct means to the shelf duct for fluid communication.

G. SLAGEL. 

